error; note that even with the proper "DIR" information it returns such error AND stops.

then I installed ntop with yum - all runs smoothly and ntop runs (apparently) normal here EXCEPT that, when asking for any graphic (network load, traffic) it doesnot show any graph, just this message:

"NOTE: this page is not operational when the RRD plugin is disabled, misconfigured or missing."

BUT.. these (and some others) are already enabled.

So, I am stuck: HOW can I got those nice graphics? think that it is closely related with those "Unable to find RRD at /usr/local/rrdtool", but I have nor error messages nor log's pointing me to the right direction.

no, but I managed to solve it and, using the debug tool got rrd to function.. but problem changed somewhat:

situation now:

a) the summary/network loads shows the traditional "NOTE: this page is not operational when the RRD plugin is disabled, misconfigured or missing." besides it is properly configured/activated (think so).

b) if using the "info about" a particular host (all protocols/traffic, then any host) and click in the "historical data" icon (last line, right), it shows various empty chart, no data at all.